Xylem H-5223 - Manual (Page 51)

Artificially High or Low Data:
1 - Check the slope and offset for the channel reading high. If it is an SDI-12 sensor
make sure it is programmed correctly.
2 - Measure the +5.0 volt excitation to see if it is ok.
3 - Try using a warm up delay before taking measurements.
4 - Check battery voltage and all connections.
GOES not transmitting:
1 - Check power to the GOES radio, do so under a load.
2 - See if the GOES time is correct, if it is stopped, it indicates power to the radio was
lost, stopping the clock. The radio will not transmit if the GOES clock is not
running.
3 - Check all antenna wires.
4 - Check antenna alignment.
5 - Use a power meter to measure the power output of the radio, and the reflected power.
4-2 Maintenance/Trouble Shooting
H-5223